Alps Electric Co., Ltd.

Other

Sony Corporation

Hiroki Hirashima

Isao Asano

Kyoichi Shirane

Takayuki Sugawara

Masahiro Matsunaga

Kazuhisa Taira

A vibration generator is provided. The vibration generator comprising a case having a hollow inside and a lower plate. A first vibrator is disposed away from the lower plate of the case and supported by first elastic member fixed to the lower plate. A second vibrator is disposed away from the first vibrator and supported by second elastic member fixed to the first vibrator. The first vibrator and the second vibrator are operable to vibrate separately. When operated separately at least two different resonance frequencies are created and transmitted to the case.

Vibration generator

A disk device for performing error-correction processing is loaded with a high-reliability disk to which a C1 code as a low-level error-correction code (ECC) is added for every sector, and a C2 code as a high-level ECC is added for every plurality of sectors. A host computer includes a device driver corresponding to the high-reliability disk. When data written to the high-reliability disk is read, low-level error-correction is performed based on the C1 code in units of one block corresponding to one sector, and the corrected data is notified to the host computer. Simultaneously, the C2 code along with the data for a plurality of blocks is loaded, and high-level error correction based on the C2 code is thereby performed.

Disk device with improved error-correction capability

A disc driving device of the type in which two different head units are moved by a linear motor along the radial direction of two discs having different recording densities. If a floppy disc with the standard recording density (lower order mode) is loaded on a disc table and a shock sensor detects the shock, a controller discontinues the recording and/or reproducing processing by a FDD (Floppy Disk Drive).

Dual head disk drive unit for differing recording densities

Growing community of inventors

Fukushima-ken, Japan

Hiroki Hirashima